21422056052 has 48 divisors (see below), whose sum is σ = 39917344320. Its totient is φ = 10041158400.

The previous prime is 21422056009. The next prime is 21422056109. The reversal of 21422056052 is 25065022412.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 992843 + ... + 1014189.

It is an arithmetic number, because the mean of its divisors is an integer number (831611340).

Almost surely, 2^21422056052 is an apocalyptic number.

It is an amenable number.

21422056052 is a deficient number, since it is larger than the sum of its proper divisors (18495288268).

21422056052 is a wasteful number, since it uses less digits than its factorization.

21422056052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21632 (or 21630 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21422056052 its reverse (25065022412), we get a palindrome (46487078464).

The spelling of 21422056052 in words is "twenty-one billion, four hundred twenty-two million, fifty-six thousand, fifty-two".